iPhone App questions: Tags & Searches

Just bought the app - it was the only 'must have' app that I knew I must have before even owning the iPhone. When I fired it up I found that I couldn't use my saved searches from the desktop web app or sort by tags...

these are how I'm organizing things on my desktop and it appears this will limit the ways I can use the app for 'doing' the work, though it will help with entering things on the fly.